--- a/demos/print-editor/print-editor.c
+++ b/demos/print-editor/print-editor.c
@@ -854,7 +854,7 @@
 }
 
 static void
-open (GApplication  *application,
+open_file (GApplication  *application,
       GFile        **files,
       int            n_files,
       const char    *hint)
@@ -898,7 +898,7 @@
 
   g_signal_connect (app, "startup", G_CALLBACK (startup), NULL);
   g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
-  g_signal_connect (app, "open", G_CALLBACK (open), NULL);
+  g_signal_connect (app, "open", G_CALLBACK (open_file), NULL);
 
   g_application_run (G_APPLICATION (app), argc, argv);